Adjusting-scale



(No Model.) I I 3 Sheets-Sheet 1. A. WESTBRMAIER. Adjusting Scale.

NO; 242,086. Patented May 24,1881.

Kn! f (1) i (10] (No Model.) 3 Sheets-Sheet 2.

A. WESTBRMAIER, Adjusting Scale. v No. 242,086. Patented May24, i881.

m min mm nmr, wmm a. e

(No Model.) 3 Sheets-Sheet 3.

A. WESTERMAIER.

w Adjusting Scale. No. 242,086. Patented May 24,1881.

E DIIQ: F.

N PETERS, PNWLilhogr-plmr. Wlthinglm. D C.

UNITED STATES PATENT OFFICE.

ADOLF IVESTERMAIER, OF PHILADELPHIA, PENNSYLVANIA.

ADJ USTlNG-SCALE.

SPECIFICATION forming part of Letters Patent No. 242,086, dated May 24,1881.

Application filed February 528, 1881. (No model.)

To all whom it may comer-21,:

Be it known that I, ADOLF WEs'rERMAIER, residing in Philadelphia,Pennsylvania, have invented certain Improvements in Scale-Balances, ofwhich the following is a specification.

My invention relates to certain improvementsin what are known asadjuslingscales or balances, one object of my improvements being toeffect, by a single movement of the hand, the elevation of thescale-beam hanger and the operation of the tray-supporting pins; and afurther object is to so secure the knife edged fulcrum and hanger-barsto the scalebeam that said bars can be readily adjusted, applied, andremoved.

In the accompanying drawings, Figure 1, Sheet 1, is a plan view of thescale; Fig. 2, a front view of the same; Fig. 3, Sheet 2, a transversevertical section; Figs. 4, 5, and 6, Sheet 3, diagrams illustrating oneof the feat tures of my invention; and Figs. 7 to ll, inclusive,enlarged views of parts of the scalebeam and bearings.

A is the base of the scale, mounted upon suitable feet at the cornersand having a tubular column, B, through which and through an opening inthe base passes a rod, D. To the upper end of this rod is secured aplate, E, carrying bearings a a for the fulcrum-bar Z) of the scale-beamF, from the opposite ends of which are suspended the trays G G, thescalebeam being furnished with the usual pointer, H, serving, inconjunction with a graduated plate on the column B, to indicate anydeflection of the scale-beam from a horizontal line.

The elevation of the rod D and plate E, carrying the scale-beam, iseffected by means of a lever, J, hung to suitable hearings on the underside of the base A, the lower end of the rod resting on the inner end ofthe lever, and the outer end of the latter being provided with lugscarrying the pivot-pin of a supplementary lever, M,which rests on thetop of the lever J, and is maintained in line with the same by means ofa spring, d. Pressure exerted upon the outer end of the lever M causesthe opera tion of the lever J and the raising of the rod D until theinner end of said leverJ comes into contact with the stop 0 on the base,when the motion of the lever is arrested, and further pressure appliedto the outer end of the lever M causes the spring (I to yield and permitthe operation of said lever Mindependently of the lever J.

The innerend ot' the lever M carries a bent rod, j, which acts in themanner described hereinafter upon the weighted arm 9 of a rockshaft,N,the latter being adapted to hearings on the under side of the base A,and having arms 71, which act upon pins Ladapted to openings in thebase, one of said pins being arranged beneath one of the trays G, andthe other beneath the opposite tray.

Vhen the scale is at rest the parts are in the positions shown in Figs.2, 3, and 4, the trays resting upon the base and in contact with thetops of the pins 2', the lower ends of which are in contact with thearms h of the rockshaft N. On depressing the outer arm of the lever Mthe lever J is caused by the spring (1 to move with the same, and therod D is elevated, thus lifting the scale-beam and the trays. The pins2' follow the latter, owing to the action of the weighted arm g on therock-shaft N, said arm being free from the control of the rod fot' thelever M, as shown in Fig. 4E. The pins are thus maintained in firmcontact with the trays, and the latter are held steadily in positionuntil the scale-beam has been elevated to the proper height a pointdetermined by the contact of the inner end of the lever J with the stop0, as shown in Fig. 5. The rod f is now in contact with the arm g of theshaft N, and further pressure upon the outer arm of the lever M causesthe elevation of said rod and the arm g and a vibration of the shaft N,so as to move the arms h downward and permit the descent of the pins 1',the trays G being thereby promptly freed from the control of the latter, and the free swinging of the scale-beam permitted. On removing thepressure from the outer end of the lever M, the operations abovedescribed are reversed, the pins 1 being first elevated so as to strikethe bottoms of the trays, and the said pins and the rod D being thensimultaneously lowered until the trays rest on the base A. By this meansthe scalebeam is held in a horizontal position during the time that itis being raised and lowered, the indicator H pointing to the zero-markon the graduated plate during such movements.

The plate E has a rod, P, passing through an opening in the base A, andserving to aid in steadying the movement of said plate.

The ends of the fulcrum-bar b on the scalebeam F are adapted to yokes mm, secured to said beam, and are held in position in said yokes byset-screws a a, Figs. 7 and 8, so that the bar can be readily applied toor removed from its place, and can be adjusted to any desired positionin the yokes.

Each of the trays G is suspended by bars 2) from a plate, 8, which isadjustable vertically on a screw-rod, 8, connected by means of auniversal joint, t, to a yoke, 10, the latter being suspended from aknife-edged bar, a on the end of the scale-beam, so that the trays arefree to swing in any direction. The barw is held in place on the beam Fby plates y y, the inner edges of which are adapted to the oppositeinclined sides of the bar, the outer ends of the plates having inclinedrecesses adapted for the reception of the beveled heads of set-screws v,and a slot in each plate being adapted for the reception of the stem ofa set screw, v, the head of which bears upon the top of the plate andserves to retain the latter in its proper vertical position. Lateraladjustment of the bar 00 is effected by loosening one of the set-screwse and tightening the opposite set-screw, the action of the beveled headsof the screws on the inclined ends of the plates causing the desiredadjustment. Thus outward movement of the bar is effected by looseningthe outer screw and tightening the inner screw, and inward movement by areverse operation.

It will be observed that the lever M acts simply to lower the pins 6,the elevation of said pins being effected by the weighted arm 9, so thatthe pins rise in contact with the trays, and the steadiness of thelatter is thereby insured.

I claim as my invention 1. The combination of the scale-beam and trays,the vertically-movable hanger, the tray supporting pins 2', theroek-sl1aftN,\vith arms h, and weighted arm g, and the duplex lever J M,as set forth.

2. The combination of the scale-beam, the knife-edged fulerumbar b, theyoltes m, and the set-screws a, as set forth.

3. The combination of the knife-edged bars 00, the scale-beam F, thecoi'liining-plates y, having beveled ends, the adjListing-screws o, andthe retaining-screws v, as set forth.

In testimony whereo'fl have signed my name to this specification in thepresence oftwo sub scribing witnesses.

ADOLF WESTERMAIER.

Witnesses:

A. R. HERMAN, HARRY SMITH.

